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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Digital Milliwatt Test
*
* \author Mark Spencer <markster@digium.com>
*
* \ingroup applications
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 209842 $")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/indications.h"
/*** DOCUMENTATION
<application name="Milliwatt" language="en_US">
<synopsis>
Generate a Constant 1004Hz tone at 0dbm (mu-law).
</synopsis>
<syntax>
<parameter name="options">
<optionlist>
<option name="o">
<para>Generate the tone at 1000Hz like previous version.</para>
</option>
</optionlist>
</parameter>
</syntax>
<description>
<para>Previous versions of this application generated the tone at 1000Hz. If for
some reason you would prefer that behavior, supply the <literal>o</literal> option to get the
old behavior.</para>
</description>
</application>
***/
static char *app = "Milliwatt";
static char digital_milliwatt[] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} ;
static void *milliwatt_alloc(struct ast_channel *chan, void *params)
{
return ast_calloc(1, sizeof(int));
}
static void milliwatt_release(struct ast_channel *chan, void *data)
{
ast_free(data);
return;
}
static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int samples)
{
unsigned char buf[AST_FRIENDLY_OFFSET + 640];
const int maxsamples = ARRAY_LEN(buf) - (AST_FRIENDLY_OFFSET / sizeof(buf[0]));
int i, *indexp = (int *) data;
struct ast_frame wf = {
.frametype = AST_FRAME_VOICE,
.subclass = AST_FORMAT_ULAW,
.offset = AST_FRIENDLY_OFFSET,
.src = __FUNCTION__,
};
wf.data.ptr = buf + AST_FRIENDLY_OFFSET;
/* Instead of len, use samples, because channel.c generator_force
* generate(chan, tmp, 0, 160) ignores len. In any case, len is
* a multiple of samples, given by number of samples times bytes per
* sample. In the case of ulaw, len = samples. for signed linear
* len = 2 * samples */
if (samples > maxsamples) {
ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n", maxsamples, samples);
samples = maxsamples;
}
len = samples * sizeof (buf[0]);
wf.datalen = len;
wf.samples = samples;
/* create a buffer containing the digital milliwatt pattern */
for (i = 0; i < len; i++) {
buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++];
*indexp &= 7;
}
if (ast_write(chan,&wf) < 0) {
ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno));
return -1;
}
return 0;
}
static struct ast_generator milliwattgen = {
alloc: milliwatt_alloc,
release: milliwatt_release,
generate: milliwatt_generate,
};
static int old_milliwatt_exec(struct ast_channel *chan)
{
ast_set_write_format(chan, AST_FORMAT_ULAW);
ast_set_read_format(chan, AST_FORMAT_ULAW);
if (chan->_state != AST_STATE_UP) {
ast_answer(chan);
}
if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0) {
ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name);
return -1;
}
while (!ast_safe_sleep(chan, 10000))
;
ast_deactivate_generator(chan);
return -1;
}
static int milliwatt_exec(struct ast_channel *chan, void *data)
{
const char *options = data;
int res = -1;
if (!ast_strlen_zero(options) && strchr(options, 'o')) {
return old_milliwatt_exec(chan);
}
res = ast_playtones_start(chan, 23255, "1004/1000", 0);
while (!res) {
res = ast_safe_sleep(chan, 10000);
}
return res;
}
static int unload_module(void)
{
return ast_unregister_application(app);
}
static int load_module(void)
{
return ast_register_application_xml(app, milliwatt_exec);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Digital Milliwatt (mu-law) Test Application");
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